Copied from PT&G website....

"This Pacific Tool & Gauge Savage Bolt Head is a precision machined, drop-in replacement part for your Savage 10 or 110 Series rifle. Perfect for use in benchrest or F-class competition rifles that fire thousands of round per year, PTG's Savage bolt head is not subject to the quick deterioration or bolt face dishing that Savage factory bolt heads tend to display after a high volume of fire. The result is a drastic reduction in primer flow and case head rounding over time. Made in the USA"

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I'm sorry I have no first hand experience with this product.

I have a Rem700 in 223rem that always leaves craters in the primers no matter what. I don't find it to be any issue at all.
If you are getting primer blanking (piercing by the firing pin) then that's a different story.

With your handloads try CCI-200 / BR-2 or CCI#34 (hardest cup of all primers)

If you could post a picture of the cratered primers we might give you a better opinion.

Do google search for "PT&G bolt head reviews" to see what others experienced and if anything else could arise besides a straight swap and maybe resetting the headspace.